A lens adjusting device of a projector is provided. The lens adjusting device has a base, a frame, and at least one positioning structure. A lens is fixed on the frame. The positioning structure is utilized for movably setting the frame on the base. The positioning structure has a groove, a slider, and a positioning unit. The groove is disposed on the frame. The slider is disposed in the groove and has a guiding hole defined therein. The extending direction of the guiding hole is substantially perpendicular to the extending direction of the groove. The positioning unit is slidably disposed in the guiding hole and penetrates the guiding hole to set the frame and the slider on the base.
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1. A lens adjusting device, comprising:
a base;
a frame;
a lens, fixed on the frame; and
at least one positioning structure, utilized for movably setting the frame on the base, the positioning structure having:
a groove, disposed on the frame;
a slider, disposed in the groove and having a guiding hole defined therein, and the guiding hole having an extending direction substantially perpendicular to an extending direction of the groove; and
a positioning unit, slidably disposed in the guiding hole and penetrating the guiding hole to set the frame and the slider on the base,
wherein the frame has at least one through hole corresponding to the positioning unit, and the size of the through hole is larger than the cross-section size of the positioning unit penetrating the through hole.
2. The lens adjusting device of
3. The lens adjusting device of
4. The lens adjusting device of
6. The lens adjusting device of
7. The lens adjusting device of
9. The lens adjusting device of
10. The lens adjusting device of
11. The lens adjusting device of
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(1) Field of the Invention
The invention relates to a lens adjusting device, and more particularly relates to a lens adjusting device of a projector.
(2) Description of the Prior Art
The location of the lens must be adjustable for adjusting the image on the screen.
It is noted that the lens adjusting device 100 needs two separate frames 140,160 and four guiding bars 130, 150 to adjust the lens. The whole structure is rather complicated. Excessive components raise not only the cost but also the weight. In addition, the excessive components also need a large room to hold this lens adjusting device 100.
The invention is to simplify the structure of the lens adjusting device by reduce the number of frames and keep lens adjusting function at the same time.
According to an embodiment of the present invention, a lens adjusting device is provided. The lens adjusting devices includes a base, a frame, a lens, and at least one positioning structure. The lens is fixed on the frame. The positioning structure is utilized for movably setting the frame on the base. The positioning structure has a groove, a slider, and a positioning unit. The groove is disposed on the frame. The slider is disposed in the groove and has a guiding hole defined therein. The extending direction of the guiding hole is substantially perpendicular to the extending direction of the groove. The positioning unit is slidably disposed in the guiding hole and penetrates the guiding hole to set the frame and the slider on the base.
In contrast with the lens adjusting device shown in
Other objectives, features and advantages of the present invention will be further understood from the further technological features disclosed by the embodiments of the present invention wherein there are shown and described preferred embodiments of this invention, simply by way of illustration of modes best suited to carry out the invention.
The invention will now be specified with reference to its embodiment illustrated in the drawings, in which
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which are shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” etc., is used with reference to the orientation of the Figure(s) being described. The components of the present invention may be positioned in a number of different orientations. As such, the directional terminology is used for purposes of illustration and is in no way limiting. On the other hand, the drawings are only schematic and the sizes of components may be exaggerated for clarity. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected,” “coupled,” and “mounted” and variations thereof herein are used broadly and encompass direct and indirect connections, couplings, and mountings. Similarly, the terms “facing,” “faces” and variations thereof herein are used broadly and encompass direct and indirect facing, and “adjacent to” and variations thereof herein are used broadly and encompass directly and indirectly “adjacent to”. Therefore, the description of “A” component facing “B” component herein may contain the situations that “A” component facing “B” component directly or one or more additional components are between “A” component and “B” component. Also, the description of “A” component “adjacent to” “B” component herein may contain the situations that “A” component is directly “adjacent to” “B” component or one or more additional components are between “A” component and “B” component. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
For a better understanding, referring to
The slider 340 has a guiding hole 350 defined therein. The extending direction of the guiding hole 350 is substantially perpendicular to the extending direction of the groove 320. The positioning unit 360 penetrates the guiding hole 350 and is slidably disposed in the guiding hole 350. In this embodiment, the extending direction of the groove 320 is parallel to the vertical direction V, and the extending direction of the guiding hole 350 is parallel to the horizontal direction H. However, the embodiment of the invention is not so limited. The extending directions of the groove 320 and the guiding hole 350 may be parallel to the horizontal direction H and the vertical direction V respectively, or show an angle of inclination.
Furthermore, as shown in
To avoid the shaking of the frame 240, the positioning unit 360 has to exert enough pressure to set the frame 240. However, in another aspect, to ensure that the frame 240 and the slider 340 is able to glide with respect to the base 220, the positioning unit 360 may reserve proper flexibility instead of completely locking the frame 240 to the base 220. Thus, as shown in
The embodiment of the invention adopts the positioning structure 300 to movably disposed the frame 240 on the base 220. Because the positioning unit 360 penetrates the through hole 242 to set on the base 220, the movable range of the frame 240 with respect to the base 220 is restricted by the size of the through hole 242. Based on this, as shown in
However, the positioning unit 360 in the through hole 242 is able to exert pressure on the frame 240 to dispose the frame 240 on the base 220. For an embodiment, the positioning unit 360 is able to support at least the weight of the frame 240 and the lens 280. Thus, to make sure that the positioning unit 360, whose the cross-section size of the end is smaller than the through hole 242, may exert pressure on the frame 240, as shown in
In addition, as shown in
As shown in
Referring to
The foregoing description of the preferred embodiment of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form or to exemplary embodiments disclosed. Accordingly, the foregoing description should be regarded as illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to practitioners skilled in this art. The embodiments are chosen and described in order to best explain the principles of the invention and its best mode practical application, thereby to enable persons skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use or implementation contemplated. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents in which all terms are meant in their broadest reasonable sense unless otherwise indicated. Therefore, the term “the invention”, “the present invention” or the like is not necessary limited the claim scope to a specific embodiment, and the reference to particularly preferred exemplary embodiments of the invention does not imply a limitation on the invention, and no such limitation is to be inferred. The invention is limited only by the spirit and scope of the appended claims. The abstract of the disclosure is provided to comply with the rules requiring an abstract, which will allow a searcher to quickly ascertain the subject matter of the technical disclosure of any patent issued from this disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Any advantages and benefits described may not apply to all embodiments of the invention. It should be appreciated that variations may be made in the embodiments described by persons skilled in the art without departing from the scope of the present invention as defined by the following claims. Moreover, no element and component in the present disclosure is intended to be dedicated to the public regardless of whether the element or component is explicitly recited in the following claims.
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| 8449124, | Sep 01 2009 | Coretronic Corporation | Lever actuated lens adjustment module |
| 8896944, | Aug 25 2011 | Panasonic Corporation | Lens barrel |
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